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Journal of Mathematics UNP

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Published by Universitas Negeri Padang

ISSN : 23551658 EISSN : 28073460 DOI : http://dx.doi.org/10.24036/unpjomath.v7i3.12564

Core Subject : Science, Education,

Computer Science & IT Decision Sciences, Operations Research & Management Mathematics

Journal of Mathematics UNP is a journal to publish article from student researches in UNP Mathematics study program, and we also kindly accept other article from outside of our study program related to Mathematics: consists of publication in Algebra, Analysis, Combinatoric, Geometry, Differential Equations, Graph and/or Mixed Mathematics Applications: consists of publication in Application of Differential Equations, Mathematics Modelling, Mathematics Physics, Mathematics Biology, Financial Mathematics, Application of Graph and Combinatorics, Optimal Control, Operation Research, and/ or Mixed Statistics: consists of publication on Development and/ or Application of statistics in various aspects.

Arjuna Subject : Matematika - Matematika (Lain-Lain)

Articles 404 Documents

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Penerapan Hukmum Weibull Pada Meitode Neiw Jersey Dalam Penenituan Cadangan Premi Asuransi Dwilguna Status Joilnt Life rahma widia; muhammad subhan
Journal of Mathematics UNP Vol 4, No 3 (2019): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Abstract— Life insurance company often find difficulties in decent money payment as according to agreement of claim. So, it is very important for the company to prepare everything to deal with this. The way is to allocate premium reserves using the New Jersey method. The calculation of endowment life insurance reserve by determining beforehand annuity, single premium, and annual premium using Weibull law. Based on the result of premium reserve calculation, the premium reserve value obtained at the end of the first year until the following year has increased. Keywords—Endowment Life Insurance, Premium Reserve, New Jersey Method, Weibull Law.

Model Matematika Pengaruh Pemberian Gadget Terhadap Anak Usia Dini Nofria Ulfah; Media Rosha
Journal of Mathematics UNP Vol 5, No 4 (2020): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Abstract — Gadgets are sophisticated technology that many people are interested in including early childhood. Parents who deliberately introduce and give gadgets to children without supervision make children addicted to their gadgets. This has led to an increase in cases of gadget addiction in early childhood. The purpose of this research is to form a mathematical model of the effect of giving gadgets to early childhood. This research is basic research. The theoretical method will be used to analyze the theories used in forming a mathematical model of the effect of gadgets on early childhood. Based on the analysis results obtained two fixed points, namely a fixed point free from gadget influence and a fixed point pendemik. The high level of influence of giving gadgets to early childhood causes the population of children to become increasingly addicted to gadgets.Keywords — gadgets, early childhood, gadget addiction.

Portofolio Mean Variance Efficient Dua Konstrain Pada 15 Saham Indeks LQ45 Fariz Rivalno; Dewi Murni; Riry Sriningsih
Journal of Mathematics UNP Vol 4, No 1 (2019): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Abstract – Portfolio is an investment tool in stocks that divide capital into a number of stocks according to the weight or percentage determined by the investor. For that, investors need to establish an optimal portfolio. One of the optimal portfolio methods is Mean Variance Efficient Two Constraints Portfolio. The purpose of this study is to obtain a formula for determining the investment weight and its application onMean Variance Efficient Two Constraints Portfolio to obtain minimal investment risk from 15 LQ45 Index stocks. The type of this research is applied research. The type of data is secondary data, in the form of closing pricestocks on the LQ45 Index period of November 9th, 2016 - March 2nd, 2017. Steps in the establishment of a portfolio is calculate the return, average return, variance return, covariance return, and find weight investment through formula on the portfolio. The result of this research is obtained a formula for determining the investment weight on Mean Variance Efficient Two Constraints Portfolio and formed an optimal portfolio on 15 LQ45 Index stocks. The portfolio provides 0.07% average return and 0.01% risk. Keywords –Constraint, LQ45 Index, Portfolio, Return, Stocks

Penentuan Cadangan Premi pada Asuransi Jiwa Berjangka Status Joint Life Menggunakan Metode Canadian Fira Septiyani Ibrahim; Dewi Murni
Journal of Mathematics UNP Vol 7, No 1 (2022): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

The Premium reserves is an obligation that must be owned by a life insurance company to provide compensation to the heirs in the event of a claim. The purpose in this research is to formulate a premium reserves formulation for term life insurance with joint life status. This research is a theoretical study that examines the calculation of the joint life status term life insurance premium reserves using the Canadian method which the 2019 Indonesian Mortality Table (TMI) and examples of case applications. The calculation of reserves begins by forming a joint mortality and commutation table for two insured persons, forming a formula for combined life annuity, single net premium, and annual net premium. Thus, in this study, the formulation of joint life insurance premium reserves using the Canadian method is obtained.

ANALISIS METODE ARIMA PADA PERAMALAN NILAI EKSPOR SUMATERA BARAT irwandi irwandi; Devni Prima Sari
Journal of Mathematics UNP Vol 6, No 4 (2021): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

The movement of the export value of the province of West Sumatra every month experiences a fluctuating condition and tends to decline. Exports are very important for the economy in a region. The decline in the value of exports allows a decrease in the amount of production of goods which can result in weakening economic growth in the region. The non-constant export value needs to be analyzed so that it can be used as an indicator for the West Sumatra government in taking policies that maximize export value, such as increasing competence and skills to produce products that are able to compete in the export market. So it is necessary to forecast the export value of the province of West Sumatra so that the government can take some planning in the future. This study aims to determine the form of the forecasting model and the results of forecasting the export value of West Sumatra for the period January 2021 to December 2021. The forecasting method used is the ARIMA method. The results show that the ARIMA (2,1,0) model is a suitable model for predicting the export value of West Sumatra, with the model Y_t=0,00131+0,5265Y_(t-1)+0,1705Y_(t-2)+0,3030Y_(t-3)+e_t.

Model Matematika Efek Perpindahan Polutan Pada Kolam Pertama Ke Kolam Kedua Dipengaruhi Adveksi Dan Dispersi Alya Anzira; Defri Ahmad
Journal of Mathematics UNP Vol 5, No 1 (2020): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Abstract —Pollution in the aquaculture environment can come from inedible food and not eaten by fish. In a variety of fish culture business basin become the choice for entrepreneurs, fish entrepreneurs have many basins for fish farming.Concentration of pollutans in the basin will decrease when the first basin is entering clean water, so pollutants will come out of the basin. Based on the results of research into the mathematical model of water pollution in the form of a partial differential equation system.Keywords — Mathematical Model, Water Pollution, n Basin.

Analisis Korelasi Kanonik Hubungan Lingkungan Pendidikan terhadap Prestasi Belajar Riski Dwi Rianto Putra; Atus Armadi Purta; Riry Sriningsih
Journal of Mathematics UNP Vol 6, No 2 (2021): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Abstract – The learning achievement is the result of learning achieved in the form of value. Environmental education is one of the factors that influence learning achievement. To see the relationship between environmental education with student achievement SMP Lanud Padang used statistical analysis canonical correlation analysis. Canonical correlation analysis is used to see the relationship between dependent variables with independent variables. The results showed that the relationship between environmental education with student achievement class VII Space Lanud Padang can not be known, because the analysis could not proceed to the stage interpretation of the canonical variables. However, based on the value of the P-Value between environmental variables and the variables education learning achievement can be seen learning achievement is affected by a significant educational environment, including PAI, PKN, Indonesian and English. And school environments have the most impact on student learning in junior high presatasi Space Lanud Padang. Keywords – Learning achievement, environmental education, canonical correlation analysis

MODEL ECONOMIC ORDER QUANTITY (EOQ) DENGAN MEMENUHI BACKORDER DAN PERMINTAAN DENGAN PEMBAYARAN KREDIT 2 TINGKAT Bella Guivera Diandes; Muhammad Subhan
Journal of Mathematics UNP Vol 5, No 3 (2020): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Abstract— Generally, payment is made after the buyer receives the goods from the seller. At this time the development of the business world in Indonesia is increasingly rapid and various innovations have emerged, such as sellers will offer a delay in payments to buyers to complete transactions. This also applies to buyers to apply trade credit to their customers as a tool to attract customer interest to increase demand. Thus this paper will discuss the effect of a two-tier trade credit, on the optimal order quantity of an economical retailer with permitted shortages of goods. And assume the buyer demand function increases over time. The purpose of this inventory model is to maximize profits. With this, we model it in mathematical form. We can see the effect of the parameters on the decision variable of fulfilling the backorder and two-level credit payments. Keywords—EOQ, Backorder, Two-level trade credit.

Analisis Sistem Antrian pada Loket Pelayanan Cepat (Fast Track) di Kantor BPJS Kesehatan Cabang Padang Envi Sari Oktaviani; Dewi Murni
Journal of Mathematics UNP Vol 4, No 4 (2019): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Abstract— Queue is a condition when some persons are waiting for their turn for a service, as often occured at the office of BPJS Kesehatan (Healthcare and Social Insurance Security Agency) in Padang because the presence of large numbers of the customers of JKN-KIS (National Healthcare Insurance – Healthy Indonesians Card) program. This research aimed to know what kind of queuing models already applied and how optimum the performance of the queuing system. This research is an applied research using primary data. The data is analysed by way of calculating the average time of arrival of the customers and average time of services, conducting distribution match test by applying Kolmologrov Smirnov test, and then analysis. The research found that the queuing models being applied are: (M/M8):(GD/∞/∞) and the number of officers at the fast track service counters needs to be increased to be more optimal. Keywords— Queue, Kolmologrov Smirnov Test, Single Channel Single Phase, Multiple Channel Single Phase.

Kajian Model Nonlinear Menggunakan Separable Programming dan Algoritma Genetika pada Lavera Konveksi Padang Cory Grahayu; Media Rosha
Journal of Mathematics UNP Vol 5, No 4 (2020): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Abstract— Convection is a line of business in the finished clothing section that producess on a large scale or in massive. In the production process, in general the working of convection are not based on customer orders, but based on a standard size. Lavera convection is one of the famous convection in the city of Padang that has obstacles in controlling orders. The purpose of this study is to determine the shape of nonlinear models from optimization of production costs in Lavera Convection using Separable Programming and Genetic Algorithms. The type of research is applied research with secondary data type. The method of data collection was carried out by researchers to the Lavera Convection in Padang and followed by data collection. Separable Programming Method is a method for transforming nonlinear objective functions into linear objective function. By completing the schedulling model using the Genetic Algorithm, the result is the minimum production cost incrured is Rp. 65.223.468, 43 with 540 long-sleeved shirth, 540 collared shirts, 360 T-shirts, 540 training pants.Keywords—optimization, production, nonlinear programming, separable programming, geneticalgorithms

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Home Page

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Contact Name Defri Ahmad

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Phone +6281374333545

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Editorial Address Jl. Prof. dr. Hamka Air Tawar Barat Padang

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Contact Name
Defri Ahmad

Contact Email
defri_math@fmipa.unp.ac.id

Phone
+6281374333545

Journal Mail Official
defri_math@fmipa.unp.ac.id

Editorial Address
Jl. Prof. dr. Hamka Air Tawar Barat Padang

Location
Kota padang,

Sumatera barat

INDONESIA